Sofa



FIG. 1 is a perspective view of a sofa according to this design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; the left side view being a mirrorimage of the right side view;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines define the bounds of the claim and form no partthereof.

CLAIM The ornamental design for a sofa, as shown and described.